Computer program for conceptual helicopter designDrake, Robert L. · First published 1986Open the Tome
The boy allies with Uncle Sam's cruisers, or, Convoying the American Army across the AtlanticDrake, Robert L. · First published 1918Open the Tome
The boy allies in the Baltic, or, Through fields of ice to aid the CzarDrake, Robert L. · First published 1916Open the Tome
The boy allies under the sea, or, The vanishing submarinesDrake, Robert L. · First published 1916Open the Tome
